The XRT Stock Car Cup is an XRT-only stock-car type racing series consisting of 4 oval events and 4 road course events. Formerly known as the StormCup, the series includes the traditional stock car racing features such as Safety Car regulated starts/restarts, Safety Car periods, the "Lucky Dog" rule for lapped cars, and required pit stops.

Events on the Kyoto Ring Oval including the special knock-out formatted All-Star Challenge, two oval events on custom courses at the AutoCross Arena, and road course events highlight the eight event schedule. Colorful skins, exciting drafting battles, and close, hard racing make the XRT Stock Car Cup the definitive stock car racing series in LFS. All events start at 20:00 UTC (15:00 EST).